This quote appeared in an article from 1997 in the Wall Street Journal and has been reprinted in many places. Ed Bearss' "B.S." remark and James McPherson's comments regarding the Black Confederate issue are also in this article.
I can find and post the article, just give me a day or two.
I've also been thinking of posting an article from the 80's by our dear and sadly missed friend, Art Bergeron. Poor old Art got attacks from both sides. You know there are zealots on both sides. Some can't tolerate one black Confederate and on the other side some need tens of thousands. If you argue with the first group the call you a white supremacist and if you argue with the others they call you not a "REAL" Southerner. Neither side rely on documentation, usually it's those pesky newspaper articles and so-called eyewitness accounts.